We can readily understand why investors are attracted to unprofitable companies. For example, although software-as-a-service business Salesforce.com lost money for years while it grew recurring revenue, if you held shares since 2005, you'd have done very well indeed. Having said that, unprofitable companies are risky because they could potentially burn through all their cash and become distressed.

So should Solid Biosciences (NASDAQ:SLDB) shareholders be worried about its cash burn? In this article, we define cash burn as its annual (negative) free cash flow, which is the amount of money a company spends each year to fund its growth. We'll start by comparing its cash burn with its cash reserves in order to calculate its cash runway.

Does Solid Biosciences Have A Long Cash Runway?

A company's cash runway is calculated by dividing its cash hoard by its cash burn. In March 2026, Solid Biosciences had US$381m in cash, and was debt-free. Importantly, its cash burn was US$173m over the trailing twelve months. That means it had a cash runway of about 2.2 years as of March 2026. Importantly, analysts think that Solid Biosciences will reach cashflow breakeven in 4 years. Essentially, that means the company will either reduce its cash burn, or else require more cash. You can see how its cash balance has changed over time in the image below.

How Is Solid Biosciences' Cash Burn Changing Over Time?

Because Solid Biosciences isn't currently generating revenue, we consider it an early-stage business. Nonetheless, we can still examine its cash burn trajectory as part of our assessment of its cash burn situation. During the last twelve months, its cash burn actually ramped up 61%. Oftentimes, increased cash burn simply means a company is accelerating its business development, but one should always be mindful that this causes the cash runway to shrink. While the past is always worth studying, it is the future that matters most of all. So you might want to take a peek at how much the company is expected to grow in the next few years.

How Easily Can Solid Biosciences Raise Cash?

While Solid Biosciences does have a solid cash runway, its cash burn trajectory may have some shareholders thinking ahead to when the company may need to raise more cash. Companies can raise capital through either debt or equity. Many companies end up issuing new shares to fund future growth. We can compare a company's cash burn to its market capitalisation to get a sense for how many new shares a company would have to issue to fund one year's operations.

Solid Biosciences has a market capitalisation of US$820m and burnt through US$173m last year, which is 21% of the company's market value. That's not insignificant, and if the company had to sell enough shares to fund another year's growth at the current share price, you'd likely witness fairly costly dilution.

So, Should We Worry About Solid Biosciences' Cash Burn?

On this analysis of Solid Biosciences' cash burn, we think its cash runway was reassuring, while its increasing cash burn has us a bit worried. One real positive is that analysts are forecasting that the company will reach breakeven. Cash burning companies are always on the riskier side of things, but after considering all of the factors discussed in this short piece, we're not too worried about its rate of cash burn.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies with significant insider holdings, and this list of stocks growth stocks (according to analyst forecasts)

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.